Adding-machine



(No Model.)

R. 1-". WI'LGOX.

ADDING MACHINE.

Patented Sept. 22, 1885.

.ZWVE-NTOR WIT ESSES N. PT[RS, Mol hogmphr, Vlamkun, D. C.

UNITED STATES PATENT OFFICE.

REUBEN F. \VILCOX, OF AUGUSTA, KANSAS.

ADDING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 326,824, datedSeptember 22, 1885.

Application filed April 18, 1885. (No model.)

To all whom, it may concern/.-

Be it known that I, REUBEN F. \VILCOX, a citizenof the United States,residing at Augusta, in the county of Butler and State of Kansas, haveinvented certain new and useful Improvements in Adding-Machines; and Ido declare the following to be a full, clear, and exact description ofthe invention, such as will enable others skilled in the art to which itappertains to make and use the same, reference being had to theaccompanying drawings, and to letters or figures of reference markedthereon, which form a part of this specification.

My invention relates to adding-machines; and it consists in the novelconstruction and combination of parts, as will be hereinafter fullydescribed, and particularly pointed out in the claim.

In the drawings, Figure 1 is a plan, view of the bottom disk or plateand the internal plate or register of hundreds, and Fig. 2 is a planview of the top plate. Fig. 3 is a sectional detail view taken on thedotted lines of Fig. 1.

Referring by letter to the accompanying drawings, A designates the baseor main plate, which is preferably of annular or disk form, and has adepressed surface, except at the rim B, which is raised above theremaining portion of the surface of the disk A sufficiently to admit theplate 0, or register-plate, between the base-plate and the top plate,F.The top plate, F, turns on a central pivot, P, rising from thebase-plate A, and is provided with one hundred (100) points, I, and onehundred holes, K, at the bases of said points I. Near its center the topplate, F, is provided with a slot, B, and a catch, T, between thecentral hole and the slot B in said plate. The plate F revolves on thecentral stud or pin. The point marked X on plate F, as seen in thedrawings, corresponds with X on the rim B, or 100, when properly inplace, and the addition now begins. As seen in the drawings, 2,700, orthe highest number on the register 0, now shows through the slot B. Thenthe catch T is now between the central hole and the slot B. Said catch,being on the under side of said plate F, is free from the register; butas the plate F is turned on around until X and X come together thelittle catch T will have caught one of the pins T on the register 0 andwill have turned the register 0 one point, leaving 100 in place of the2,700viz., in slot B. The one hundred holes in plate F are for theinsertion of the pencil-point to turn plate F. For example, X and X areopposite. Turn point X by means of a pencil to 20 on A. Then go backwith the pencil to X, or 100. Take the point you find there and turn itaround to 20. Point X will then be at 40. Continue thus taking the pointopposite 100 and turn to any number desired, and pointX will advanceaccordingly, and when itgets around to 100 on the plate A the registerwill show the amount through the slot B of plate F.

Having thus fully described my invention, what I. claim, and desire tosecure by Letters Patent of the United States, is

The calculator described, consisting of the base-plate A, having theraised rim, as shown, provided with numerals from 1 to 100, and thecentral pivot-stud, I the top plate, F, arranged on the said pivot,having the peripheral points, each provided with a hole, and the openingB, and the catch T between the said opening and the pivot-aperture, andthe register 0, pivotally arranged between the base-plate and therevolving top plate, and provided with the peripheral pins T, the wholeadapted to operate substantially as specified.

In testimony whereof I affix my signature in presence of two witnesses.

REUBEN F. \VILOOX.

WVitnesses:

T. SEXTON, S. K. JonNsToN.

